128887323 has 4 divisors (see below), whose sum is σ = 171849768. Its totient is φ = 85924880.

The previous prime is 128887321. The next prime is 128887337. The reversal of 128887323 is 323788821.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 323788821 = 3 ⋅107929607.

It is a cyclic number.

It is not a de Polignac number, because 128887323 - 2¹ = 128887321 is a prime.

It is a super-2 number, since 2×128887323² = 33223884060212658, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (128887321) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 21481218 + ... + 21481223.

It is an arithmetic number, because the mean of its divisors is an integer number (42962442).

Almost surely, 2^128887323 is an apocalyptic number.

128887323 is a deficient number, since it is larger than the sum of its proper divisors (42962445).

128887323 is an equidigital number, since it uses as much as digits as its factorization.

128887323 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42962444.

The product of its digits is 129024, while the sum is 42.

The square root of 128887323 is about 11352.8552796202. The cubic root of 128887323 is about 505.1302777960.

The spelling of 128887323 in words is "one hundred twenty-eight million, eight hundred eighty-seven thousand, three hundred twenty-three".